ZIRCONIA BASED COATING FOR REFRACTORY ELEMENTS AND REFRACTORY ELEMENT COMPRISING OF SUCH COATING
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United States of America Patent
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Feb 11, 2016
app pub date -
Mar 12, 2014
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Mar 14, 2013
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A coating composition for applications at temperatures higher than 1200 degrees C. comprises (a) between 80.0 and 99.9 wt. % of unstabilized zirconia; and (b) between 0.1 and 5.0 wt. % of a liquid phase former which is solid at ambient temperature and either melts or reacts, or decomposes to form a liquid phase above a temperature not lower than 1000 degrees C.; wherein the wt. % are expressed in terms of total solid weight of the coating composition at room temperature. A refractory element that may be made of a carbon bonded refractory comprises a coated surface comprising a first coating of the coating composition as defined above.
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